Extrusion & Post
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PVB Lamination Flowability Imbalance
Fenómeno del problema
Improper PVB flowability during lamination, too high causes flow-out and glue shortage, too low causes insufficient filling.
Análisis de la causa
Under relatively high lamination temperature, the film should soften with appropriate flowability to fill the space between glass; too much flowability causes edge film flow-out producing glue shortage; insufficient flowability causes incomplete filling; high-temperature modulus influence.
Solución
①PVB high-temperature modulus and flowability matching design; ②Lamination temperature and pressure program optimization; ③Edge sealing management; ④Flowability testing and verification.; After adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Conclusión clave
The balance of PVB lamination flowability is the process core; high-temperature modulus is a material design parameter; edge management prevents glue shortage.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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